Hi,

The 'ref' was meant for the .NET call.
My VFP is getting a bit rusty I'm afraid. Does the following work:

FUNCTION MyRoutine(param1 as String,param2 as Variant @)

>I changed the calling routine to your suggestion but got a complier
> error message in dot net
> argument '2' should not be passed with the 'ref' keyword.
>
>I then tried to change the VFP routine parameter line to:
>FUNCTION MyRoutine(param1 as String,ref param2 as String)
>by inserting the -->ref <--- keyword but it gives a complier error.
>
>Any ideas ??
>Regards,
>Gerard
>
>
>
>>

>MyVfpDll(MyInputParam,ref MyOutputParam)

>>
>>
>>>I have a VFP DLL thats working fine being called from within a Dot Net App, and am passing in a parameter as in:
>>>string MyInputParam;
>>>MyInputParam = "100"
>>>MyVfpDll(MyInputParam)
>>>..this works great.
>>>
>>>I also want to pass an Output paramater as in
>>>string MyOutputParam
>>>MyOutputparam = "Blank Now"
>>>MyVfpDll(MyInputParam,MyOutputParam)
>>>...at this stage MyOutPutparm should have something different
>>>
>>>However, even though MyOutputParam gets changed in the VFP dll,after returning from the DLL, it has not changed in .Net.
>>>
>>>Anybody know if theres something else I need to do ?
>>>Regards,
>>>Gerard